Enable/disable Windows dial-up server at specified time automatically.
Windows operating systems have a very useful feature, dial-up server (also called remote access server).

If it is enabled, you can connect to your computer by dial-up from another computer just like you connect to Internet. For example you can use your home computer to connect to your office server and gain access to its shared files, printers and other network resources.

Unfortunately, dial-up server causes some problems if you have to use the same phone line both for dial-up access and normal speaking.

The simplest way to avoid it is to disable dial-up server when you don't need it. Dial-up Server Manger is just designed to do it automatically.